Simplify the motif. Instead of a busy rosebud repeat, look for a simplified design for a casual, playful look. The oversized scale of the Tobago design by Arte Wallpapers is fresh and contemporary.
They didn't intend for the dining room to have a pronounced retro feel; Flores just picked the wallpaper because she liked the pattern (it's called Tobago, by Arte Wallpapers). She already had the dining set.